What Happens If I Miss My Lightning Lane Window?
Quick Answer
If you miss your official return window, you have approximately 119 additional minutes (the grace period) to tap into the ride. If you miss the grace period too, the reservation is lost - you can't ride that attraction via Lightning Lane that day, but your booking slot is freed up.
Detailed Explanation
Missing your official 1-hour Lightning Lane return window is not catastrophic because of the grace period. After your window expires, the ride touchpoint continues to accept your reservation for approximately 119 more minutes. So if your window was 2:00-3:00 PM, you can still tap in until around 4:59 PM. However, if you miss both the official window AND the grace period, the reservation is lost entirely. You cannot ride that specific attraction via Lightning Lane that day (though you could ride it standby). The silver lining: missing a window completely does free up your booking slot, so you can make a new reservation for a different attraction. This is why stacking intentionally lets windows expire - you gain a slot while the grace period keeps the ride available.
Example
Your Haunted Mansion window is 1:00-2:00 PM. You get caught up watching a parade and it's now 2:15 PM. Don't panic - you have until approximately 3:59 PM to tap in. But if you wait until 4:05 PM, the touchpoint will reject your scan with a red light. At that point, Haunted Mansion is lost via Lightning Lane for the day.